diff --git a/setup.py b/setup.py
index 4cf9073b..58a5c24f 100755
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,7 @@
     "freezegun==0.3.15",
     "pretend==1.0.9",
     "pytest-cov==2.8.1",
-    "pytest-httpx",
+    "pytest-httpx>=0.14",
     "pytest-asyncio",
     "pytest==6.2.5",
     "requests_mock>=0.7.0",
diff --git a/tests/test_async_transport.py b/tests/test_async_transport.py
index f5e8d1b0..ee215265 100644
--- a/tests/test_async_transport.py
+++ b/tests/test_async_transport.py
@@ -19,7 +19,7 @@ def test_load(httpx_mock):
     cache = stub(get=lambda url: None, add=lambda url, content: None)
     transport = AsyncTransport(cache=cache)
 
-    httpx_mock.add_response(url="http://tests.python-zeep.org/test.xml", data="x")
+    httpx_mock.add_response(url="http://tests.python-zeep.org/test.xml", text="x")
     result = transport.load("http://tests.python-zeep.org/test.xml")
     assert result == b"x"
 
@@ -30,7 +30,7 @@ def test_load_cache(httpx_mock):
     cache = InMemoryCache()
     transport = AsyncTransport(cache=cache)
 
-    httpx_mock.add_response(url="http://tests.python-zeep.org/test.xml", data="x")
+    httpx_mock.add_response(url="http://tests.python-zeep.org/test.xml", text="x")
     result = transport.load("http://tests.python-zeep.org/test.xml")
     assert result == b"x"
 
@@ -45,7 +45,7 @@ async def test_post(httpx_mock: HTTPXMock):
 
     envelope = etree.Element("Envelope")
 
-    httpx_mock.add_response(url="http://tests.python-zeep.org/test.xml", data="x")
+    httpx_mock.add_response(url="http://tests.python-zeep.org/test.xml", text="x")
     result = await transport.post_xml(
         "http://tests.python-zeep.org/test.xml", envelope=envelope, headers={}
     )
@@ -67,7 +67,7 @@ async def test_http_error(httpx_mock: HTTPXMock):
     transport = AsyncTransport()
 
     httpx_mock.add_response(
-        url="http://tests.python-zeep.org/test.xml", data="x", status_code=500
+        url="http://tests.python-zeep.org/test.xml", text="x", status_code=500
     )
     with pytest.raises(exceptions.TransportError) as exc:
         transport.load("http://tests.python-zeep.org/test.xml")